I started taking this as another supplement to help keep my ovarian cancer in check. I don't know if this has made a difference or not but my last scans show less "activity" in the active cancer cells. I was advised my many that this is good to fight cancer. I can't attest to it as fact since I take so many other things also but it sure hasn't hurt. My cancer has not advanced but neither has it died completely out but does seem to be deminishing every time I do a scan (every 3 months) No type of side effects either.